diff --git a/Assets/Cryville/Crtr/PdtEvaluator.cs b/Assets/Cryville/Crtr/PdtEvaluator.cs
index 91b2156..6006a78 100644
--- a/Assets/Cryville/Crtr/PdtEvaluator.cs
+++ b/Assets/Cryville/Crtr/PdtEvaluator.cs
@@ -860,7 +860,7 @@ namespace Cryville.Crtr {
 				if (tv != null) return new JudgeFunctionResult();
 				var t0 = GetOperand(0).AsNumber() + fn;
 				var t1 = GetOperand(1).AsNumber() + tn;
-				if (ft > t0 && ft <= t1) return new JudgeFunctionResult();
+				if (ft <= t0 || ft > t1) return new JudgeFunctionResult();
 				return new JudgeFunctionResult(EvaluateArea(fv), ft);
 			}
 		}